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基于投影统计特征与K均值聚类的十字光斑中心定位算法 被引量:2
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作者 苗家壮 胡旭晓 +2 位作者 伍非凡 兰国清 吴跃成 《浙江理工大学学报(自然科学版)》 2017年第5期705-711,共7页
以光斑中心准确定位为核心问题的激光三角法广泛应用于轧钢平直度检测系统中。针对湿平整后钢板形貌检测中面临的液滴干扰,为保持光斑中心提取的准确性和鲁棒性,提出了一种十字激光光斑中心定位算法。该算法首先采集所有十字光斑像素在... 以光斑中心准确定位为核心问题的激光三角法广泛应用于轧钢平直度检测系统中。针对湿平整后钢板形貌检测中面临的液滴干扰,为保持光斑中心提取的准确性和鲁棒性,提出了一种十字激光光斑中心定位算法。该算法首先采集所有十字光斑像素在多个方向的投影值,投影方向自图像坐标系X轴正方向开始0到π之间均匀分布;然后通过构建频数直方图,利用K均值聚类算法确定光条投影值边界;最后通过坐标变换求得十字光斑中心坐标。通过计算机仿真与实验,比较了该算法与直线拟合法在施加液滴干扰前后,对十字光斑进行中心定位的精度与鲁棒性。结果表明:该算法在液滴干扰下的重复定位结果可靠,置信度为99%的置信椭圆面积大约相当于三种点激光中心定位算法的2%。因此,该算法不仅能够在液滴干扰下准确定位十字光斑中心,而且使十字激光较点激光体现出更好的重复定位精度。 展开更多
关键词 十字光斑 投影统计特征 K均值聚类 鲁棒性 中心定位
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PROJECTION BASED STATISTICAL FEATURE EXTRACTION WITH MULTISPECTRAL IMAGES AND ITS APPLICATIONS ON THE YELLOW RIVER MAINSTREAM LINE DETECTION 被引量:1
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作者 Zhang Yanning Zhang Haichao +2 位作者 Duan Feng Liu Xuegong Han Lin 《Journal of Electronics(China)》 2009年第3期359-365,共7页
Mainstream line is significant for the Yellow River situation forecasting and flood control.An effective statistical feature extraction method is proposed in this paper.In this method, a between-class scattering matri... Mainstream line is significant for the Yellow River situation forecasting and flood control.An effective statistical feature extraction method is proposed in this paper.In this method, a between-class scattering matrix based projection algorithm is performed to maximize between-class differences, obtaining effective component for classification;then high-order statistics are utilized as the features to describe the mainstream line in the principal component obtained.Experiments are performed to verify the applicability of the algorithm.The results both on synthesized and real scenes indicate that this approach could extract the mainstream line of the Yellow River automatically, and has a high precision in mainstream line detection. 展开更多
关键词 Mainstream line PROJECTION Between-class scatter matrix High-order statistics SKEWNESS
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